Molding apparatus



C. A. SNOW.

MOLDING APPARATUS. APPLICATION men JULY 27. 1918.

Patented Mar- 15, 1921.

2 SHEETS-SHEET l- C. A. SNOW. MOLDING APPARATUS.

7 APPLICATION FILED JULY 27, l9l8- 1,371,447, Patented Mar. 15,1921.

.2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

CLARENCE A. SNOW, OF NEWTON, IOWA, ASSIGNOR TO THE MAYTAG COMPANY, OF

NEWTON, IOWA, A CORPORATION OF IOWA.

MOLDING APPARATUS.

Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed Ju1y 27, 1918. Serial No. 246,956.

To all whom it may concern:

Be it known that I, CLARENCE A. Snow, a citizen of the United States,residing at Newton, in the county of Jasper and State of Iowa, haveinvented new and useful Improvements inMolding Apparatus, of which thefollowing is the specification.

This invention relates to apparatus for use in forming molds in sand orthe like and more particularly to the withdrawal of the gate patternstherefrom.

Among the objects of my invention is to make possible theeasy, safe, andrapid withdrawal of the gate patterns for connecting the runner with thecasting, after the same has been rammed or tamped in the mold; furtherto attain the foregoing object in connection with the form of gatesknown as horn gates; further to provide apparatus in which the gatepatterns are caused to move in the are of a circle to eliminate alldanger of tearing the sand in withdrawing the gate patterns; further toeffect the simultaneous withdrawal of a plurality of gate patterns bythe single operation of a handle; further toreturn all of the gatepatterns to their operative position by a mere reverse operation to thatlast mentioned; further to provide a more simple, efiicacious, andeconomical apparatus; and such further objects, advantages andcapabilities as will later more fully appear.

My 'nvention further resides in the combination, construction andarrangement of parts illustrated in the accompanying drawings, and whileI have shown therein a preferred embodiment I desire it to be understoodthat the same is susceptible of modification and change withoutdeparting from the spirit of my invention.

In the drawings:

Figure 1 is a perspective view of the upper side of a match plateembodying my invention.

Fig. 2 is a vertical transverse sectional view. of Fig. 1 and showing aportion of the support for the match plate.

Fig. 3 is a detail view showing the arrangement for transmittingrotation from one shaft to the other, r

Fig.4 isaplan view of the match plate for forming the drag or lower halfof the mold.

Fig. 5 is an edge elevation of Fig. 4.

Flg. 6 is a vertical transverse section through Fig. 4.

As is well known in the art of molding the mold may be formed upon theopposite sides of a single match plate, the two halves of the moldfitting together upon the with drawal of the match plate and patterns;or the cope may be formed upon one match plate and the drag uponanother, after which the two halves of the mold will beput together. Ihave illustrated my invention as applied to a match plate of the latterclass, the match plate for the cope being illustrated in F igs, 1 and 2,and the match plate for the drag half of the mold being illustrated inFigs. 4 to 6.

As shown in Figs. 4 to 6 the match plate for formlng the drag isdesignated at 1, and has secured thereto a suitable pattern 2 forforming the runner in the mold. The plate 1 is also provided in theusual manner with a plurality of openings 3, within which are embeddedto the proper depth the patterns 4 for forming the lower half of themold. After the sand is suitably rammed or tamped 1n the drag and thedrag and match plate 1 rolled over upon the bottom board, the plate 1 isthen removed and the patterns with-- drawn. 5 designates suitable pinssecured to the plate 1 to properly position the ears of the drag.

Referring now to Figs. 1 and 2, it will be seen that the match plate forformingthe cope or top half of the mold comprises the plate 6 providedwith suitable means such as the aperture 7, and the shoulder 8 forproperly positioning and maintaining the cope portion of the flaskthereon. The match plate 6 is also provided'in the usual manner with therecesses 9, within which are seated the patterns 10 to a depthsuflicient to form the proper parting. The patterns are also providedwith suitable core prints 10' and 11. The plate 6 is also provided witha plurality of apertures 12, through which eX- fan gear QO-secured uponthe shaft17, in

order to transmit rotation,but in an opposite-direction to shaft 17. Thehorn gate patterns 13 and'13' areformed in the arc of a circle wherebyupon suitable rotation of shafts 16 and 17 they will be withdrawn fromthe sand of the mold, which has been tamped therearound, and caused topass downwardly through the apertures 12.

The" operation of my improved device is as follows: The drag half of themold is formed upon the match plate illustrated in Figs. 4 to 6, andcompleted in an appropriate manner, it having formed therein the runnerdepression by virtue of the runner pattern 52 secured to match plate 1.After completion of the lower half of the mold theupper half is thenformed on match plate 6 shown in Figs. 1 and 2. It is here pointed outthat the larger ends of the horn gate patterns 13 and 13 are inapproximate alinement, so that after the top half of the mold iscompleted and placed upon the bottom half these larger ends of the horngate patterns will fall just above the runner depression formed in thelower half of the mold, into which runner the molten metal will beconducted through a sprue opening formed in' the usual manner. It is ofcourse, understood that prior to filling in the sand for the upperportion of the mold thatthe horn gate patterns will be swung into theposition illustrated in Fig. 1. After the sandis suitably tamped orrammed in the upper half of the mold the handle 18 will be raised, thusswinging the horn gate patterns 13 downwardly into the position, asindicated by dotted lines in Fig. 2, thus entirely removing these gatepatterns from the sand of the mold and leaving a passageway which, whenthe pattern is removed from the mold, will conduct the hot metalfrom'the runner into the mold cavity. By virtue of the engagementbetween the fan gears 19 and 20 the downward movement of the horn gatepatterns 13 will be accompanied by a similar downward movement of thehorn gate patterns 13', aswill be clearly seen from the drawing.

. While I have illustrated and'described my improved device for removinggates as being applied in the construction of the up per half of themold, it is obviousthat the same may be equally well applied in theformation of the lower half of the mold, if desired.

Having now described my invention, I claim: i 1. In apparatus of theclass described a plate having a plurality of apertures there in andadapted to have mounted thereon at a distance from each aperture'apattern, a horn pattern gate mounted in each of said apertures for'movement therethrough, and means for simultaneously withdrawing saidpatterns through said apertures, said gate patterns being adapted tocontact with said first named patterns. 1

2. In apparatus of the class described a plate having a plurality ofapertures therein, a shaft rotatably associated with said plate, and aplurality ofhorn gate patterns rigidly mounted on said shaft and adaptedto move through said apertures upon rotation of said shaft, and means torotate said shaft. r

3. In apparatus of the class described a plate having a plurality ofapertures therein, a pair of parallel shafts rotatably mounted on saidplate, a plurality of horn gate patterns secured to each ofsaid-shaftsand adapted for movement through said apertures upon rotationof said shafts, and means for rotating said shafts whereby tosimultaneously withdraw all of said patterns through said apertures,

4. In'apoaratus of the class described a plate having a plurality ofapertures therein, a pair of parallel spaced'shafts rotatably mounted onsaid plate, aplurality of horn gate patterns secured to each'of saidshafts and adapted for movement through said apertures, means forrotating one of said shafts, and means fortransmitting rotation fromsaid last mentioned shaft to the'other shaft whereby to simultaneouslywithdraw said patterns through said apertures.

5. In apparatus of theclass described a plate having a plurality ofapertures there'- in, a horn gate pattern mounted in each of saidapertures for movement therethrough, that portion of said horn gatepatterns adapted to extend through said apertures being curvedsubstantially on the .arc of a circle, a shaft rotatably 'mounted onsaid plate, and arms rigidly connecting the curved portion of the'hornfgate "patterns with said shaft whereby uponrotation of said shaftsaid horn gate patterns Will'be moved through said apertures.

'6. In apparatus. of the'class described a plate adapted to have mountedthereon a pattern, said plate having an aperture therein spaced fromsaid pattern, a gate pattern mounted for movement through said apertureand. a'daptedfto contact with said pattern, and means for causing'saidgate pat tern to move through saidaperture toward and away from saidpattern.

7. In apparatus of the class described a plate having a plurality ofapertures therein, a pair of shafts rotatably mounted thereon, aplurality of horn gate patterns secured to each of said shafts andadapted to rotate therewith, said gate patterns being mounted formovement in either direction through said apertures, a handle on one ofsaid shafts for rotating the same, and a gear on each of said shaftsadapted to intermesh whereby movement of said handle will causesimultaneous rotation of said shafts and a corresponding movement ofsaid gate patterns through said apertures.

In witness whereof, I hereunto subscribe 15 my name to thisspecification in the presence of two witnesses.

CLARENCE A. SNOW.

Witnesses:

G. A. A. SAUNDERS, W. H. THOMAS.

